For the given function $f(x)$ and values of L, c, and $\epsilon > 0$ find the largest open interval about c on which the inequality $|f(x) - L| < \epsilon$ holds. Then determine the largest value for $\delta > 0$ such that $0 < |x - c| < \delta \implies |f(x) - L| < \epsilon$
f(x) = 5x + 4, L = 39, c = 7, $\epsilon = 0.1$
The largest open interval about c on which the inequality $|f(x) - L| < \epsilon$ holds is
(Use interval notation)
